From f069dc1dbc1e17b04b2ec65f65d1c9e9af667ff5 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Michel=20D=C3=A4nzer?= <michel.daenzer@amd.com>
Date: Tue, 29 Jul 2014 18:47:22 +0900
Subject: [PATCH] drm/radeon/cik: Read back SDMA WPTR register after writing it
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For symmetry with other *_set_wptr hooks.

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/radeon/cik_sdma.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/radeon/cik_sdma.c b/drivers/gpu/drm/radeon/cik_sdma.c
index d629cea..db8ce30 100644
--- a/drivers/gpu/drm/radeon/cik_sdma.c
+++ b/drivers/gpu/drm/radeon/cik_sdma.c
@@ -119,6 +119,7 @@ void cik_sdma_set_wptr(struct radeon_device *rdev,
 		reg = SDMA0_GFX_RB_WPTR + SDMA1_REGISTER_OFFSET;
 
 	WREG32(reg, (ring->wptr << 2) & 0x3fffc);
+	(void)RREG32(reg);
 }
 
 /**
-- 
2.7.4